Switch-stand.



L. G. COLEMAN.

SWITCH STAND.

APPLICATION FILED JUNE 25, I9I5.

Patented Nov. 28, 1916.

3 S H E ETS -SHEET I.

Jim/Emmi l @501 WWW WWW L. G. COLEMAN.

SWITCH STAND.

APPLICATION men JUNE 25, 1915.

3 SHEETS-SHEET 2.

L.E.5.Z7LEM/*7N Patented. Nov. 28,

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L. G. COLEMA N.

SWITCH STAND.

APPLICATION man JUNE 25. 19M

1 fifififlk 1 5, I Patented Nov. 28, 1916.

3 SHEETS-SHEET 3.

'46 A we? LOCKETT GWIN COLEMAN, OF OTTAWA, ONTARIO, CANADA.

SWITCH-STAND.

1,2tltiAt15.

Specification of Letters Patent.

Patented Nov. 2%, 1916.

Application filed June 25, 1915. Serial No. 86,270.

To all whom it may concern Be it known that I, LOCKETT GwIN Conn- MAN, a subject of the King of Great Britain, and resident of the city of Ottawa, Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Switch-Stands, of which the following is the specification.

This invention relates to switch stands and particularly refers to the locks thereof, and the objects of the invention are to render it impossible to extract the key unless the switch is set and properly locked, to facilitate in removing the lock for the purpose of repair or renewal without in any way interfering with the operat1on of the switch, to retain the locking bolt n retracted position when the switch is open. to permit of the locking bolt being automatically released when the switch is closed. to provide for the locking of the switch when the main lock is out of commission and other objects to be made clear hereafter, and it consists essentially of the improved construction particularly described and set forth in the following specification and accompanying drawings forming part of the same.

In the drawings, Figure 1 is a side elevation of the switch stand with the lever in closed or locked position. Fig. 2 is a front elevativn of the same. Fig. 3 is a fragmentary side elevation with the lever partially raised. Fig. 4 is an enlarged fragmentary side elevation of the switch with the lever broken away, showing the location of the lock. Fig. 5 is an enlarged fragmentary side elevation of the switch with the lever broken away, showing the auxiliary looking means designed to be utilized when the lock is removed. Fig. 6 is a perspective view of the improved lock. Fig. 7 is a plan viewof the lock. Fig. 8 is a side elevation of the same. Fig. 9 is a side elevation of the lock, taken from the opposite side to that illustrated in Fig. 8. Fig. 10 is a transverse Fig. 11 is a Fig. 12 is section of the lever and lock. transverse section of the lever. a side elevation of the key.

Like characters of reference refer to like parts in the several figures.

Referring to the drawings, A represents a switch stand of any well known or usual construction and B the lever therefor. In accordance with the present inven lever B, the tongue I) being mounted on the switch stand and designed to coact with the said lock.

The lever B is formed with a bifurcated end, the arms 10 and 11 of which are pivotally attached to the switch stand A and is further provided with an integral casing E embraced by the said arms intermediate of their length and designed to house or contain the working parts of the lock.

The side members of the casing E are formed by the arms 10 and 11 while the ends 13 and the top 14s are formed integral therewith, the casing being completed by the removable bottom 15 carrying the lock mecha nism operatively mounted thereon.

The bottom 15 carries a flange 16 provided along its lateral edges with integral guide members 17, the lower ends of which are preferably beveled or rounded and is further provided with a rectangular orifice 18 intermediate of its length in which the locking bolt 19 slidably fits and a slot20 in its upper edge, the object .of which will be made clear hereafter.

To facilitate in securing the bottom plate 15 in position, I provide integral flanges 21 extending outwardly from its lateral edges and having orifices 22 therethrough designed to register with the orifices 23 in the arms 10 and 11 of the lever B with which orifices the pins 24 friotionally engage.

The outer end of the locking bolt 19 is substantially wedge shaped while the inner end is bifurcated, forming arms 25 carrying pairs of wards 26 on the upper edges thereof and provided on the lower edge with integral outwardly extending flanges 27, one of which is designed to coact with the interlocking plate 28 to retain the locking bolt in a retracted position.

The bottom plate 15 carries an integral block 29 embraced by the arms 25 of the locking bolt and is provided with. a key spindle 30 and a longitudinally extending orifice 31 therein designed to house the spring 32 adapted to normally press the locking bolt outwardly.

Thelocking plate 28 is pivotally mounted at one end to the post 33, the other end being formed with a tongue designed to en gage with the slot 20 in the flange 16 beyond which it projects slightly. This locking plate carries on its lower edge an angularly disposed detent or projection 34 and time the spring lock G is attached to the isfurther "reduced. intermediate of its ends and provided with a pin 35 supporting the spring 36 adapted to coact with the top 14 of the casing E, thereby pressing the locking plate toward the flange 27 of the locking bolt so that the projection 34 engages with the edge of the said flange and retains the locking bolt in a retracted position. The inner edge of the block 29 is preferably made curved and provided with a flange 37 forming a ward adapted to coact with the key 38.

It is desirable that the inner faces of the arms 10 and 11 of the lever B should be made with a slight bevel so that the lock can be easily inserted therebetween or withdrawn therefrom.

The key hole 39 in the top 14 of the casing is suitably covered by a plate 40 pivotally mounted on the horizontally disposed hinge pin 40, thereby facilitating in rotating the said plate over the key hole and preventing moisture or the like entering the casing and collecting on the working parts of the lock.

In the event of the lock being out of commission and removed for the purpose of repair, it is essential that the switch should be adequately locked and to this end I provide a pin 41 adapted to engage with the orifices 42 in the ends 13 of the casing, which orifices are adapted to register with the orifice in the tongue D when the switch is in a closed position.

In assembling the lock, the locking bolt 19 is slidably engaged with the rectangular orifice 18 in the flange 16, the flange 27 of the bifurcated end of the locking bolt slidably engaging the bottom plate 15. In this position it will be'understood that the arms 25 of the bifurcated inner end of the looking bolt embrace the block 29, and the wards 26 are located adjacent to the flange 37 of the said block. The locking plate 28 is now pivotally mounted on the post 33 with'the tongue slidably engaging the slot 20 in the flange 16 and the spiral spring 36 mounted upon the pin 35. The mechanism of the lock is now housed in the casing with the flange 21 snuglyengaging. the arms 10' and 11 of the lever whereupon when the ori flees 22 and 23 register the pins 24 are hammered into position.

In the operation of unlocking the switch the key 38 is inserted in the key hole 39 of the casing E and the spindle 30 engaged whereupon on turning the key the wards 26 are engaged to withdraw the locking bolt 19 from engagement with the tongue D whereupon the lever B may be rotated in a vertical plane.

the detent or projection 34 engages with the said flange and retains the locking bolt 19 in a retracted position. \Vhen the locking bolt 19 is so engaged by the locking plate 28 it will be seen that it is quite impossible to withdraw the key from the lock since it is located between the wards 26 and is therefore unable to be turned in any direction.

As the lever B is being closed the tongue D engages with the tongue of the locking plate 28 pressing the same upwardly and releasing the detent 34 from engagement with the flange 27 so permitting of the locking bolt 19 being pressed outwardly under the action of the spring 32 thereby permitting of the key being free from engagement with the wards 26 and withdrawn through the key hole 39.

When the lock is removed for any purpose, it will be understood that the pin 41 may be utilized as an auxiliary locking means so that the switch may be retained in a closed position.

What I claim as my invention is:

1. In a switch lock and in combination, a switch stand, an operating lever therefor, a lock casing having an opening, a tongue on the stand adapted to enter the opening, a reciprocable sliding spring actuated locking bolt adapted to engage the tongue, a spring latch device adapted to retain the bolt in retracted position and adapted to be released by engagement with the tongue, a key and means adapted to prevent withdrawal of the key except when the bolt is in a locking position.

2. The combination with a switch stand, of a lever provided with a bifurcated end, a lock casing formed integral with the lever and embraced by the said end the lateral faces of the casing being beveled, a removable bottom plate' carrying the locking mechanism adapted to engage the casing, and means for securing the bottom plate to the casing.

3. The combination with a switch stand, of a lever provided with a bifurcated end, a lock casing formed integral with the lever and embraced by the bifurcated end, a bottom plate, a locking bolt slidably mounted on the bottom plate, resilient means for pressing the locking bolt normally outwardly, a pivotally mounted locking plate provided with a downwardly extending projection adapted to coact with the locking bolt, and means for operating the pivotally mounted locking plate, as and for the purpose specified.

4. The combination with a switch stand, of a lock comprising a slidably mounted locking bolt provided with a bifurcated end, wards formed integral with the upper edges ofthe arms of the bifurcated end, flanges on the lowerends of the arms, resilient means controlling the motion of the locking bolt, a pivotally mounted locking plate provided with a downwardly extending projection designed to engage with one of the flanges, and means for operating the locking plate.

5. The combination with a switch stand, of a lock comprising a locking bolt having an inner bifurcated end, a spiral spring coacting with the locking bolt, flanges on the lower ends of the arms of the locking bolt, a pivotally mounted locking plate provided with a downwardly extending projection designed to coact with one of the flanges, resilient means for pressing the locking plate into contact with the flange, and means for releasing the locking plate.

6. The combination with a switch stand, of a tongue mounted thereon, a lock comprising a locking bolt, a locking plate cooperating with the locking bolt and adapted to retain the same in a retracted position, and a tongue on the locking plate coacting with the first said tongue.

7. The combination with a switch stand, of a lever, a lock casing formed integral with the lever and provided with orifices in the upper and lower ends thereof, a tongue on the switch stand having an orifice therein adapted to register with the orifices in the casing when the switch is closed, and a pin engaging with the said orifices.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

LOCKETT GWIN COLEMAN.

Witnesses: K

JAMEs MITCHELL, RUSSEL B. SMART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

